What sound signal indicates to proceed ahead?

The sound signal that indicates to proceed ahead is represented by two prolonged blasts. This signal is used in maritime communication to convey the intention of a vessel to either signal other vessels or as a notification in areas where visibility is poor. The two prolonged blasts communicate that the vessel is operating under a condition where it can safely go forward, encouraging other vessels to remain aware and navigate accordingly.

Understanding the context of sound signals is crucial for maintaining safety on the water. For instance, different combinations and durations of blasts serve specific purposes, such as warning vessels of impending maneuvers or communicating the presence and movement intentions of a ship. In this instance, two prolonged blasts effectively communicate the clear intention to proceed, thereby promoting safe operations among vessels in proximity.